It is very do-able. When I first began singing, I started as an alto, and I can get through that song with much aplomb.
A few suggestions to help you along:
1. It is key to warm-up properly. Think of your vocal chords and your diaphragm as if they were made of rubber - it is easier to stretch a rubber band or blow up a balloon once they have been stretched and warmed by your hands. Very similar concept.
2. Do not yell the last note. That will irritate your vocal chords and lead to vocal nodes.
3. Make certain that you have correct posture so that your diaphragm can expand properly.
4. Breathe deeply.
5. Make certain that you are lifting your upper pallette when you sing. This is often times referred to as an 'inward smile.' If you do not know how to do this, it is akin to the feeling you get when you yawn, or when you sneeze. Your resonant cavities will then be open, which allows for better projection and support of your sound. A lot of singers will actually yawn (or at least have a great urge to do so) after a note like that.
(This also encourages the deep breathing!)
I hope this helps!